Cosmetic composition

ABSTRACT

The present invention relates to a cosmetic composition containing the following Components (A), (B), and (C): Component (A): a hydrophobic polymer which dissolves in ethanol at 25° C. in an amount of 1% by mass or more, and has a glass transition temperature Tg of 30° C. or higher, the polymer having the same electric charge as the following Component (B), or not having an electric charge; Component (B): a hydrophilic ionic polymer which dissolves in ethanol at 25° C. in an amount of 1% by mass or more; and Component (C): an ionic polymer which dissolves in ethanol at 25° C. in an amount of 1% by mass or more, the ionic polymer having a different kind of an electric charge to that of the Component (B). The cosmetic composition of the present invention can be suitably used in cosmetics for hair.

FIELD OF THE INVENTION

The present invention relates to a cosmetic composition, cosmetics, anda method of hair styling.

BACKGROUND OF THE INVENTION

In conventional hair styling, a method of maintaining including forminga coating film on hair surfaces, to provide strength of the coating filmhas been adopted. However, when a coating film is made firm in order toincrease the styling property, there are some disadvantages that thecoating films are more likely to come off by impacts of contacting orthe like of hairs per se in daily lives. In order to improve thedisadvantages, Patent Publication 1 shows an example of a stylingcomposition which is formed into a thick. film or gel with anamphophilic linear block copolymer containing a hydrophilic block and ahydrophobic block, and Patent Publication 2 shows an example ofimproving styling property and flexibility of a coating film using ablock polymer having a rigid constituting unit and a soft constitutingunit, each unit having a different Tg, when formed as a polymer.

However, in these methods, there are some disadvantages that the settingproperties of the hair are lowered under the high humidity conditions.In view of the above, Patent Publication 3 provides a block polymerhaving a relatively high binding strength under relatively high humidityconditions due to the functions of blocks having different Tg's as acosmetic or personal care-composition, each containing a thermoplasticelastomer used as a film-forming polymer, and a diluent or a carrierwhich is acceptable in cosmetics.

Patent Publication 1: Japanese Patent Laid-Open No. 2004-2432

Patent Publication 2: Japanese Unexamined Patent Publication No.2003-534264

Patent Publication 3: Japanese Unexamined Patent Publication No.2004-510719

SUMMARY OF THE INVENTION

However, in conventional polymers, when impacts are applied due tocontacting or the like of hairs themselves after hair styling under thehigh-humidity conditions, the holding of the hair setting cannot besufficiently guaranteed.

The present invention relates to the provisions of a cosmeticcomposition having excellent retentiveness and impact resistance of thehair setting under the high-humidity conditions, and cosmetics, and amethod of hair styling including applying the cosmetic composition tohair.

The present invention relates to the following [1] and [2]:

-   [1] A cosmetic composition containing the following Components (A),    (B), and (C):-   Component (A): a hydrophobic polymer which dissolves in ethanol at    25° C. in an amount of 1% by mass or more, and has a glass    transition temperature Tg of 30° C. or higher, the polymer having    the same electric charge as the following Component (B), or not    having an electric charge;-   Component (B): a hydrophilic ionic polymer which dissolves in    ethanol at 25′C in an amount of 1% by mass or more; and-   Component (C): an ionic polymer which dissolves in ethanol at 25° C.    in an amount of 1% by mass or more, the ionic polymer having a    different kind of an electric charge to that of the Component (B).-   [2] A method of hair styling, including applying a cosmetic    composition as defined in [1] to hairs.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a front view showing a schema constitution of a shakingapparatus used in the evaluation of the setting properties.

FIG. 2 is a perspective view showing a schematic constitution of ashaking apparatus used in the evaluation of the setting properties.

DETAILED DESCRIPTION OF THE INVENTION

According to the present invention, a cosmetic composition and cosmeticshaving excellent retentiveness and impact resistance of the hair settingunder high-humidity conditions, and a method of hair styling includingapplying the cosmetic composition to hairs can be provided.

[Cosmetic Composition]

The cosmetic composition of the present invention contains the followingComponents (A), (B), and (C):

-   Component (A): a hydrophobic polymer which dissolves in ethanol at    25° C. in an amount of 1% by mass or more, and has a glass    transition temperature Tg of 30° C. or higher;-   Component (B): a hydrophilic ionic polymer which dissolves in    ethanol at 25° C. in an amount of 1% by mass or more; and-   Component (C): an ionic polymer which dissolves in ethanol at 25° C.    in an amount of 1% by mass or more, and has a different kind of an    electric charge to that of the Component (B).-   Components (A), (B), and (C) are each a polymer which dissolves in    ethanol at 25° C. in an amount of 1% by mass or more.

The hydrophilic polymer as used herein refers to a polymer havingtransmittance in accordance with the following measurement method of 80%or more, and the hydrophobic polymer as used herein refers to a polymerhaving transmittance in accordance with the following measurement methodof less than 80%. Here, as in Polymer a3 used in Examples set forthbelow, in a case where the polymer is a cationic polymer containing 30%by mass or more of the constituting units derived from methylmethacrylate in the polymer, the polymer is a hydrophobic polymerregardless of the transmittance.

(Preparation of Samples)

Water is added in an amount of 67 parts by mass, based on 100 parts bymass of an ethanol solution containing 10% by mass of the polymer(unneutralized), to provide a sample.

(Measurement Method)

The absorbance of the sample at 25° C. is measured with aspectrophotometer at 450 to 700 nm.

Here, when a sample. is a neutralized product, the transmittance ismeasured after recovering a non-neutralized state according to thefollowing procedures.

-   Tool: A chromatograph tube having an inner diameter of 30 mm and a    height of 300 mm (glass filter, with a stopper)-   Resin: Dowex™ 50 W×8, 100 to 200 mesh strongly acidic cationic    exchanging resin (H type), manufactured by FUJIFILM Wako Pure    Chemical Corporation-   Amount of resin filled to the tool: 60 g

Procedures:

-   1. The resin was washed with ion-exchanged water, and then    substituted with ethanol, and filled in the chromatograph tube.-   2. Plascize L-9909B, manufactured by GOO CHEMICAL CO., LTD., was    diluted with ethanol to a concentration of 20% by mass, and 20 g of    the above sample was introduced in the resin-filled chromatograph    tube. A resin layer was allowed to flow through the tube by    deadweight, and an intended product (non-neutralized product) was    collected from the bottom.

Although the mechanisms that the cosmetic composition of the presentinvention has excellent retentiveness and impact resistance of the hairsetting (hereinafter both are also together referred to “hygroscopicresistance”) under the high-humidity conditions are not elucidated, themechanisms are assumed to be as follows. In the cosmetic composition ofthe present invention, Component (A) and Component (B) are incompatibledue to the differences in polarities, so that, for example, theevaporation of the solvent is induced, thereby' forming alayer-separation structure. Concurrently, Component (C) forms acrosslinked structure due to the electrostatic interactions withComponent (B). Since a phase formed by Component (A) (a hydrophobicphase) would hardly absorb water in the air, the polymer is still rigidwithout undergoing plasticization. A phase formed by Component (B) (ahydrophilic phase) absorbs water in the air and undergoesplasticization, but exhibits both flexibility and toughness due to thecrosslinking with Component (C). By maintaining the styling by thecoarseness of Component (A), and preventing a coating film from breakingby moderating the impacts by the flexibility and the toughness ofComponents (B) and (C), it is assumed that the hygroscopic resistancethat is more excellent than those of the prior arts is exhibited.

[Component (A)]

Component (A) is a hydrophobic polymer which dissolves in ethanol at 25°C. in an amount of 1% by mass or more, and has a glass transitiontemperature Tg of 30° C. or higher. Component (A) may be any one ofanionic polymers, cationic polymers, and nonionic polymers, and it ispreferable that the polymer is an ionic polymer having the same electriccharge as the following Component (B), or a polymer not having anelectric charge, from the viewpoint of enhancing the retentiveness ofthe hair setting under high-humidity conditions. Component (A) has thesame electric charge as Component (B), indicating that Component (A) isa cationic polymer, if Component (B) is a cationic polymer, andComponent (A) is an anionic polymer, if Component (B) is a anionicpolymer. Specific examples include cationic polymers, anionic polymers,nonionic polymers, and the like described later, and more specificexamples include a copolymer containing a polyacrylic acid-based polymerhaving an acrylic acid backbone, the copolymer containing a constitutingunit derived from a monomer polymerizable with acrylic acid, thecopolymer containing a constituting unit containing an acrylamide havinga linear alkyl group having 1 or more carbon atoms and 12 or less carbonatoms or a branched alkyl group having 3 or more carbon atoms and 6 orless carbon atoms, or styrene, and even more specific examples includehydrophobic polymers having constituting units mentioned later or thelike, from the viewpoint of maintaining styling. Since Component (A) andComponent (B) have the same electric charge, it is considered thatComponent (A) also forms a crosslinked structure due to electrostaticinteractions with Component (C).

The glass transition point Tg of Component (A) is 30° C. or higher,preferably 40° C. or higher, more preferably 50° C. or higher, even morepreferably 60° C. or higher, and still even more preferably 70° C. orhigher, from the viewpoint of enhancing hygroscopic resistance, and theglass transition point is preferably 180° C. or lower, more preferably150° C. or lower, and even more preferably 130° C. or lower, from thesame viewpoint.

The weight-average molecular weight of Component (A) is preferably 5000or more, more preferably 20000 or more, and even more preferably 100000or more, from the viewpoint of enhancing hygroscopic resistance, and theweight-average molecular weight is preferably 500000 or less, morepreferably 450000 or less, and even more preferably 350000 or less, fromthe viewpoint of enhancing hairwash removability. The method formeasuring a weight-average molecular weight is as described in Examplesset forth below.

The amount of the amine when Component (A) is a cationic polymer ispreferably I% by mass or more, more preferably 3% by mass or more, andeven more preferably 5% by mass or more, from the viewpoint of enhancinghygroscopic resistance, and the amount of the amine is preferably 50% bymass or less, more preferably 35% by mass or less, even more preferably30% by mass or less, and still even more preferably 20% by mass or less,from the same viewpoint. The amount of the amine in Component (A) asused herein means an amount occupied by the constituting units having anamino group in the molecule, in the entire constituting unitsconstituting Component (A).

The amount of carboxylic acid when Component (A) is an anionic polymeris preferably 1% by mass or more, more preferably 3% by mass or more,and even more preferably 5% by mass or more, from the viewpoint ofenhancing hygroscopic resistance, and the amount of the carboxylic acidis preferably 50% by mass or less, more preferably 35% by mass or less,even more preferably 30% by mass or less, and still even more preferably20% by mass or less, from the same viewpoint. The amount of thecarboxylic acid in Component (A) as used herein means an amount occupiedby the constituting units having an carboxy group in the molecule, inthe entire constituting units constituting Component (A).

The content of Component (A) in the cosmetic composition of the presentinvention is preferably 5% by mass or more, more preferably 28% by massor more, and even more preferably 42% by mass or more, from theviewpoint of enhancing hygroscopic resistance, and the content ispreferably 83% by mass or less, more preferably 75% by mass or less, andeven more preferably 60% by mass or less, from the viewpoint ofenhancing hygroscopic resistance and hairwash removability.

[Component (B)]

Component (B) is a hydrophilic ionic polymer which dissolves in ethanolat 25° C. in an amount of 1% by mass or more. Specific examples includehydrophilic cationic polymers, hydrophilic anionic polymers, and thelike, which are mentioned later. From the viewpoint of enhancinghygroscopic resistance, more specific examples include a polyacrylicacid-based polymer having an acrylic acid backbone, which is a copolymercontaining a constituting unit derived from a monomer copolymerizablewith acrylic acid and containing a constituting unit derived from amonomer having an amino group, and even more specific examples includehydrophilic polymers having constituting units mentioned later, and thelike.

The glass transition point Tg of Component (B) is preferably 0° C. orhigher, more preferably 10° C. or higher, even more preferably 25° C. orhigher, and still even more preferably 40° C. or higher, from theviewpoint of enhancing hygroscopic resistance, and the glass transitionpoint is preferably 130° C. or lower, more preferably 120° C. or lower,and even more preferably 100° C. or lower, from the same viewpoint.

The weight-average molecular weight of Component (B) is preferably 5000or more, more preferably 20000 or more, and even more preferably 100000or more, from the viewpoint of enhancing hygroscopic resistance, and theweight-average molecular weight is preferably 500000 or less, morepreferably 450000 or less, and even more preferably 350000 or less, fromthe viewpoint of enhancing hairwash removability. The method formeasuring a weight-average molecular weight is as described in Examplesset forth below

The amount of the amine when Component (B) is a cationic polymer ispreferably 1% by mass or more, more preferably 5% by mass or more, andeven more preferably 10% by mass or more, from the viewpoint ofenhancing hygroscopic resistance, and the amount of the amine ispreferably 60% by mass or less, more preferably 45% by mass or less, andeven more preferably 35% by mass or less, from the same viewpoint. Theamount of the amine in Component (B) as used herein means an amountoccupied by the constituting units having an amino group in themolecule, in the entire constituting units constituting Component (B).

The amount of the carboxylic acid when Component (B) is an anionicpolymer is preferably 1% by' mass or more, more preferably 5% by mass ormore, and even more preferably 10% by mass or more, from the viewpointof enhancing hygroscopic resistance, and the amount of the carboxylicacid is preferably 60% by mass or less, more preferably 45% by mass orless, and even more preferably 35% by mass or less, from the sameviewpoint. The amount of the carboxylic acid in Component (B) as usedherein means an amount occupied by the constituting units having ancarboxy group in the molecule, in the entire constituting unitsconstituting Component (B).

The content of Component (B) in the cosmetic composition of the presentinvention is preferably 10% by mass or more, more preferably 21% by massor more, and even more preferably 38% by mass or more, from theviewpoint of enhancing hygroscopic resistance and hairwash removability,and the content is preferably 91% by mass or less, more preferably 67%by mass or less, and even more preferably 55% by mass or less, from theviewpoint of enhancing hygroscopic resistance.

In the cosmetic composition of the present invention, the mass ratio ofComponent (A) to Component (B) [Component (A)/Component (B)] ispreferably 0.1 or more, more preferably 0.5 or more, and even morepreferably 0.8 or more, from the viewpoint of enhancing hygroscopicresistance, and the mass ratio is preferably 5.0 or less, morepreferably 3.0 or less, and even more preferably 1.5 or less, from theviewpoint of enhancing hygroscopic resistance and hairwash removability.

[Component (C)]

Component (C) is an ionic polymer which dissolves in ethanol at 25° C.in an amount of 1% by mass or more, wherein the polymer is capable offorming a crosslinked structure by electrostatic interactions withComponent (B), the ionic polymer having a different kind of an electriccharge to that of the Component (B). The ionic polymer having adifferent kind of an electric charge to that of the Component (B) refersto the following polymer: When Component (B) is an anionic polymer,Component (C) is a cationic polymer and/or a polymer having anamphoteric group, and when Component (B) is a cationic polymer,Component (C) is an anionic polymer and/or a polymer having anamphoteric group. Specific examples include cationic polymers, anionicpolymers, polymers having an amphoteric group, and the like which arementioned later. From the viewpoint of maintaining styling and enhancinghygroscopic resistance, more specific examples include a copolymercontaining a polyacrylic acid-based polymer having an acrylic acidbackbone, the copolymer containing a constituting unit derived from amonomer polymerizable with acrylic acid, which is one or more membersselected from an acrylamide having a linear alkyl group having 1 or morecarbon atoms and 12 or less carbon atoms or a branched alkyl grouphaving 3 or more carbon atoms and 12 or less carbon atoms, acrylic acid,and alkyl acrylates having I or more carbon atoms and 22 or less carbonatoms, and even more specific examples include polymers havingconstituting units mentioned later.

The glass transition point Tg of Component (C) is preferably 20° C. orhigher, more preferably 30° C. or higher, even more preferably 40° C. orhigher, and still even more preferably 45° C. or higher, from theviewpoint of enhancing hygroscopic resistance, and the glass transitionpoint is preferably 180° C. or lower, more preferably 150° C. or lower,and even more preferably 130° C. or lower, from the same viewpoint.

The weight-average molecular weight of Component (C) is preferably 500or more, more preferably 1000 or more, and even more preferably 2000 ormore, from the viewpoint of enhancing hygroscopic resistance, and theweight-average molecular weight is preferably 800000 or less, morepreferably 600000 or less, and even more preferably 400000 or less, fromthe viewpoint of enhancing hairwash removability. The method formeasuring a weight-average molecular weight is as described in Examplesset forth below.

The content of Component (C) in the cosmetic composition of the presentinvention is preferably 0.05% by mass or more, more preferably 0.1% bymass or more, and even more preferably 0.5% by mass or more, from theviewpoint of enhancing hygroscopic resistance, and the content ispreferably 50% by mass or less, more preferably 15% by mass or less, andeven more preferably 5% by mass or less, from the viewpoint of enhancinghygroscopic resistance and dissolubility in a solvent contained in thecosmetics.

In the cosmetic composition of the present invention, the content ofComponent (C) in a total of Components (A), (B), and (C), % by mass, ispreferably 0.05% by mass or more, more preferably 0.1% by mass or more,and even more preferably 0.5% by mass or more, from the viewpoint ofenhancing hygroscopic resistance, and the content is preferably 50% bymass or less, more preferably 15% by mass or less, and even morepreferably 5% by mass or less, from the viewpoint of enhancinghygroscopic resistance and dissolubility in a solvent contained in thecosmetics.

[Constituting Units that Constitute Components (A), (B), and (C)]

In the present invention, Components (A), (B), and (C) mentioned aboveare polymers of various monomers, and the constituting units may be anyone of constituting units derived from hydrophobic unsaturated monomersor hydrophilic unsaturated monomers.

Specifically, the hydrophobic unsaturated monomer includes(meth)acrylates having a hydrocarbon group having 1 or more carbon atomsand 22 or less carbon atoms; acrylarnides having a hydrocarbon grouphaving 1 or more carbon atoms and 22 or less carbon atoms; halogenatedolefins such as vinyl chloride, vinyl fluoride, vinylidene chloride, andvinylidene fluoride; olefins such as ethylene, propylene, andisobutylene; vinyl esters such as vinyl formate, vinyl acetate, vinylpropionate, and vinyl versatate; styrene; and the like.

The hydrophilic unsaturated monomers include nonionic unsaturatedmonomers, anionic unsaturated monomers, cationic unsaturated monomers,and amphoteric unsaturated monomers, and the like.

The nonionic unsaturated monomers include (meth)acrylamides; hydroxygroup-containing or ether group-containing (meth)acrylates such ashydroxyethyl (meth)acrylate, polyethylene glycol mono(meth)acrylate, andmethoxypolyethylene glycol mono(meth)acrylate; and the like.

The anionic unsaturated monomers include carboxy group-containingunsaturated monomers such as (meth)acrylic acid, maleic acid, maleicanhydride, itaconic acid, crotonic acid, and 6-acrylamidehexanoate;sulfonate group-containing unsaturated monomers such as styrenesulfonicacid, 3-(methacryloyloxy)propanesulfonic acid, acrylamidepropanesulfonic acid, and 2-acrylamide-2-methylpropanesulfonic acid: andthe like.

These anionic unsaturated monomers can be used directly in the form ofacids, or can be partially neutralized or completely neutralized andused. Alternatively, these monomers can he used directly in the form ofacid when used in a copolymer, and the copolymer can then be partiallyneutralized or completely neutralized. The base used in theneutralization is, for example, an alkali metal hydroxide such aspotassium hydroxide or sodium hydroxide; ammonia; an amine compound suchas monoethanolamine, diethanolamine, triethanolamine, or trimethylamine.

The cationic unsaturated monomers include one or more members selectedfrom unsaturated monomers having an amino group and unsaturated monomershaving a quaternary ammonium base.

The unsaturated monomers having an amino group includeN,N-dimethylaminoethyl (meth)acrylate, N,N-diethylaminoethyl(meth)acrylate, N,N-dimethylaminopropyl (meth)acrylate,N,N-diethylaminopropyl (meth)acrylate, N,N-dimethylaminoethyl(meth)acrylamide, N,N-diethylaminoethyl (meth)acrylamide,N,N-dimethylaminopropyl (meth)acrylamide, N,N-diethylaminopropyl(meth)acrylamide, 2-vinylpyridine, 4-vinylpyridine, and structures inwhich these monomers are neutralized with an acid represented by H⁺X⁻.

Here, X⁻ is an anion including a halide ion such as a chloride ion or abromide ion; an organic acid ion such as an alkyl sulfate ion of whichalkyl moiety has 1 or more carbon atoms and 3 or less carbon atoms, anacetate ion, a lactate ion, a benzoate ion, an adipate ion, a formateion, a malate ion, or a glycolate ion; or the like. The alkyl sulfateion, the lactate ion, the formate ion, the malate ion, or the glycolateion is preferred, arid the lactate ion is more preferred, from theviewpoint of the feel of hair after setting when the hair is set withthe hair cosmetics of the present invention, and the settingretentiveness under the high-humidity conditions,

In addition, the unsaturated monomers having a quaternary ammonium baseinclude (meth)acryloyloxyethyl trimethylammonium,(meth)acryloyloxypropyl trimethylammonium, (meth)acryloylaminoethyltrimethylammonium, (meth)acryloylaminopropyl trimethylammonium, diallyldimethylammonium, 1-ethyl-4-vinylpyridinium,1,2-dimethyl-5-vinylpyridinium, and the like, each having X⁻as acounterion.

The amphoteric unsaturated monomers include compounds obtained bytreating a cationic unsaturated monomer mentioned above with a.denaturation agent such as a sodium or potassium haloacetate, and thelike. Specific examples areN-(meth)acryloyloxyethyl-N,N-dimethylammonium-N-methylcarboxybetaine,N-(meth)acryloyloxyethyl-N,N-diethylammonium-N-methylcarboxybetaine,N-(meth)acryloyloxypropyl-N,N-dimethylammonium-N-methylcarboxybetaine,N-(meth)acryloyloxypropyl-N,N-diethylammonium-N-methylcarboxybetaine,methyl-2-vinylpyridinium carbonate, and methyl-4-vinylpyridiniumcarbonate.

In the present invention, it is preferable that Components (A), (B), and(C) mentioned above have one or more groups selected from alkylamidegroups and aminoalkylamide groups, from the viewpoint of enhancinghygroscopic resistance. In addition, it is preferable that one or moreconstituting units selected from formulas 1, 2, and 3 given below arepreferred, from the same viewpoint.

<Constituting Unit Represented by formula 1>

The constituting unit represented by formula 1 as used herein has thefollowing structure:

wherein R¹ is a hydrogen atom or a methyl group; and each of R² and R³is independently a hydrogen atom or a hydrocarbon group having 1 or morecarbon atoms and 12 or less carbon atoms which may have a substituent,with proviso that

when either one of R² or R³ is a hydrogen atom, the other is ahydrocarbon group having 1 or more carbon atoms and 12 or less carbonatoms, and

when both R² and R³ are not a hydrogen atom, they are hydrocarbon groupshaving a total number of carbon atoms of R² and R³ of 2 or more and 24or less;

alternatively, R² and R³ may be bound to each other to form a ringstructure, wherein a total number of carbon atoms of R² and R³ in thatcase is 3 or more and 24 or less.

The constituting unit represented by formula 1 is a constituting unitwhich is derived by polymerizing an unsaturated monomer represented byformula 1′ given below:

wherein each of R¹, R² and R³ in formula 1′ are the same as thosedefined in formula 1.

The preferred substituents in formula 1 and formula 1′ are as follows.

R¹ is a. hydrogen atom or a methyl group. A hydrogen atom is morepreferred, from the viewpoint of availability of the unsaturatedmonomers, and from the viewpoint of polymerizability of the monomers.

Each of R² and R³ is independently a hydrogen atom or a hydrocarbongroup having 1 or more carbon atoms and 12 or less carbon atoms whichmay have a substituent. The substituent in R² and R³ includes a phenylgroup, and the like, and it is preferable that each of R² and R³ is ahydrogen atom or a hydrocarbon group having 1 or more carbon atoms and12 or less carbon atoms.

When either one of R² or R³ is a hydrogen atom, the other is ahydrocarbon group having 1 or more carbon atoms and 12 or less carbonatoms. A hydrocarbon group having 8 or less carbon atoms is preferred,and a hydrocarbon group having 6 or less carbon atoms is more preferred,from the viewpoint of improving dissolubility in a solvent contained inthe cosmetics and hairwash removability.

When both of R² and R³ are not a hydrogen atom, a total number of carbonatoms of R² and R³ is 2 or more and 24 or less. A total number of carbonatoms is preferably 8 or less, and a total number of carbon atoms ismore preferably 6 or less, from the viewpoint of improving dissolubilityin a solvent contained in the cosmetics and hairwash removability.

In addition, each of R² and R³ is preferably a linear or branched alkylgroup, or a hydrocarbon group having a ring structure, and each is morepreferably a linear or branched alkyl group, from the viewpoint ofenhancing impact resistance under the high-humidity conditions.

When R² and R³ are bound to each other to form a ring structure, a totalnumber of carbon atoms of R² and R³ is 3 or more and 24 or less. A totalnumber of carbon atoms is preferably 8 or less, and a total number ofcarbon atoms is more preferably 6 or less, from the viewpoint ofimproving dissolubility in a solvent contained in the cosmetics andhairwash removability.

It is preferable that either one of R² or R³ is a hydrogen atom, and theother is a hydrocarbon group having 4 or more carbon atoms and 24 orless carbon atoms, from the viewpoint of improving dissolubility in asolvent contained in the cosmetics and hairwash removability. Each of R²and R³ is more preferably an alkyl group having 4 or more carbon atomsand 24 or less carbon atoms, even more preferably an alkyl group having4 or more carbon atoms and 8 or less carbon atoms, still even morepreferably an alkyl group having 4 carbon atoms, still even morepreferably a branched alkyl group having 4 carbon atoms, and still evenmore preferably a tent-butyl group, from the viewpoint of enhancingimpact resistance under the high-humidity conditions.

Specific examples of the unsaturated monomers represented by formula 1′include (meth)acrylamides such as dimethyl (meth)acrylamide, N-butyl(meth)acrylamide, N-isobutyl (meth)acrylamide, N-tert-butyl(meth)acrylamide, N-pentyl (meth)acrylamide, N-(2,2-dimethylpropyl)(meth)acrylamide, N-methyl-N-butyl (meth)acrylamide, N-ethyl-N-propyl(meth)acrylamide, N,N-dipropyl (meth)acrylamide, N-tert-octylacrylamide, and isobornyl (meth)acrylamide.

The unsaturated monomers represented by formula 1′ are preferably one ormore members selected from N-butyl (meth)acrylamide, N-isobutyl(meth)acrylamide, and N-tert-butyl (meth)acrylamide, and more preferablyN-tert-butyl (meth)acrylamide, from the viewpoint of enhancing impactresistance under the high-humidity conditions. Here, the term“(meth)acryl” as used herein means acryl, methacryl, or both.

<Constituting Unit Represented by Formula 2>

The constituting unit represented by formula 2 as used herein has thefollowing structure:

wherein R⁴ is a hydrogen atom or a methyl group;

if X¹ is an oxygen atom,

—Y¹—X² is a group selected from an alkyl group having 1 or more carbonatoms and 18 or less carbon atoms, an isobornyl group,—(CH₂)_(p)—N(R⁵)₂, —(CH₂)_(p)—OR⁵, —C(CH₃)₂—N(R⁵)₂, and —C(CH₃)₂—OR⁵,where p is 1 or more and 3 or less, and R⁵ is a hydrogen atom or analkyl group having 1 or more carbon atoms and 4 or less carbon atoms; or

alternatively, Y¹ is a group containing 1 to 15 polyoxyalkylene groupshaving 2 or 3 carbon atoms, X² is a hydrogen atom, —CH₃, or —C₂H₅, or

if X is NH,

Y¹ is an alkylene group having 1 or more carbon atoms and 3 or lesscarbon atoms, X² is —N(R⁵)₂, wherein R⁵ is a hydrogen atom or an alkylgroup having 1 or more carbon atoms and 4 or less carbon atoms.

The constituting unit represented by formula 2 is a constituting unitwhich is derived by polymerizing an unsaturated monomer represented byformula 2′ given below:

wherein each of R¹, R² and R³ in formula 2′ are the same as thosedefined in formula 2.

The preferred substituents in formula 2 and formula 2′ are as follows,

—Y¹—X² is a group selected from an alkyl group having 1 or more carbonatoms and 18 or less carbon atoms, an isobornyl group, —(CH₂)_(p)—NR⁵)₂,—(CH₂)_(p)—OR⁵, —C(CH₃)₂—N(R⁵)₂, and —C(CH₃)₂—OR⁵, where p is 1 or moreand 3 or less, and R⁵ is a hydrogen atom or an alkyl group having 1 ormore carbon atoms and 4 or less carbon atoms;

Y¹ is a group containing 1 to 15 polyoxyalkylene groups having 2 or 3carbon atoms;

X² is —N(R⁵)₂ or —OR⁵, wherein the alkyl group of R⁵ includes a methylgroup, an ethyl group, a propyl group, and a butyl group. Accordingly,specific examples where X² is —N(R⁵)₂ include a dimethylamino group, amethylethylamino group, a diethylamino group, a dipropylamino group, adibutylamino group, and the like. Further, specific examples where X² is—OR⁵ include a methoxy group, an ethoxy group, a propoxy group, a butoxygroup, and the like. Here, R⁵ in N(R⁵)₂ may be identical or different.

Specific examples of the unsaturated monomers represented by formula 2′include dimethylaminopropyl acrylamide, dimethylaminoethyl acrylate,dimethylaminoethyl methacrylate, diethylaminoethyl acrylate,diethylaminoethyl methacrylate, and the like, and dimethylaminopropylacrylamide is preferred, from the viewpoint of enhancing hairwashremovability and hydrolytic resistance.

<Constituting Unit Represented by formula 3>

The constituting unit represented by formula 3 as used herein has thefollowing structure:

wherein R⁶ is a hydrogen atom or a methyl group, and X³ is an aromaticgroup having 6 or more carbon atoms and 12 or less carbon atoms.

The constituting unit represented by formula 3 is a constituting unitwhich is derived by polymerizing an unsaturated monomer represented byformula 3′ given below.

wherein each of R¹, R² and R³ in formula 3′ are the same as thosedefined in formula 3.

The preferred substituents in formula 3 and formula 3′ are as follows.

X³ is an aromatic group having the number of carbon atoms of 6 or moreand 12 or less, and preferably 6 or more and 10 or less. X³ includes aphenyl group, a tolyl group, a xylyl group, and the like.

The unsaturated monomers represented by formula 3′ include styrene,α-methylstyrene, 4-methylstyrene, 4-butylstyrene, dimethylstyrene, andthe like. Styrene is preferred, from the viewpoint of enhancinghygroscopic resistance.

The cosmetic composition of the present invention is exemplified by thefollowing embodiments (Ia), (Ib), (IIa), and (IIb) with regard to thecombinations of the polymers blended.

Embodiment of Ia

Ia is a cosmetic composition containing the following Components (A),(B), and (C):

-   Component (A): a hydrophobic cationic polymer which dissolves in    ethanol at 25° C. in an amount of 1% by mass or more, and has a    glass transition temperature Tg of 30° C. or higher;-   Component (B): a hydrophilic cationic polymer which dissolves in    ethanol at 25° C. in an amount of 1% by mass or more; and-   Component (C): an anionic polymer and/or a polymer having an    amphoteric group, which dissolves in ethanol at 25° C. in an amount    of 1% by mass or more.

In the above embodiment of Ia, from the viewpoint of maintaining stylingand having hygroscopic resistance, it is preferable that

-   Component (A) is a polymer containing a constituting unit derived    from one or more members selected from acrylamide monomers having a    linear alkyl group having 1 or more carbon atoms and 12 or less    carbon atoms or a branched alkyl group having 3 or more carbon atoms    and 12 or less carbon atoms and aromatic vinyl monomers, and a    constituting unit derived from a monomer having an amino group;-   Component (B) is a polymer containing a constituting unit derived    from a monomer having an amino group; and-   Component (C) is a polymer containing a constituting unit derived    from a monomer having a carboxy group.

Here, the phrase “derived from” as used herein shows that theunsaturated monomers are polymerized to form a polymer.

In the above embodiment of Ia, from the same viewpoint, it is morepreferable that Component (A) is prepared so that the constituting unitsrepresented by formula 1a given below are contained in an amount ofpreferably 56% by mass or more, more preferably 60% by mass or more, andeven more preferably 70% by mass or more, or the constituting unitsrepresented by formula 2a given below are contained in an amount ofpreferably 45% by mass or more, more preferably 50% by mass or more, andeven more preferably 60% by mass or more, or the constituting unitsrepresented by formula 3 given below are contained in an amount ofpreferably 45% by mass or more, more preferably 50% by mass or more, andeven more preferably 60% by mass or more, and it is more preferable thatComponent (B) is prepared so that a total of the constituting unitsrepresented by formula 1b given below, the constituting unitsrepresented by formula 2b given below, and the constituting unitsrepresented by formula 2c given below is contained in an amount ofpreferably 44% by mass or more, more preferably 50% by mass or more, andeven more preferably 60% by mass or more.

wherein R¹ is a hydrogen atom or a methyl group; and each of R² and R′is independently a hydrogen atom or a hydrocarbon group having 1 or morecarbon atoms and 12 or less carbon atoms which may have a substituent,with proviso that

when either one of R² or R³ is a hydrogen atom, the other is ahydrocarbon group having 4 or more carbon atoms and 12 or less carbonatoms, and

when both R² and R³ are not a hydrogen atom, they are hydrocarbon groupshaving a total number of carbon atoms of R² and R³ of 5 or more and 24or less; or

alternatively, R² and R³ may be bound to each other to form a ringstructure, and a total number of carbon atoms of R² and R³ in that caseis 5 or more and 24 or less;

wherein R¹ is a hydrogen atom or a methyl group; and each of R² and R³is independently a hydrogen atom or a hydrocarbon group having 1 or morecarbon atoms and 3 or less carbon atoms which may have a substituent,with proviso that

when either one of R² or R³ is a hydrogen atom, the other is ahydrocarbon group having 1 or more carbon atoms and 3 or less carbonatoms, and

when both R² and R³ are not a hydrogen atom, they are hydrocarbon groupshaving a total number of carbon atoms of R² and R³ of 2 or more and 4 orless;

alternatively, R² and R³ may be bound to each other to form a ringstructure, and a total number of carbon atoms of R² and R³ in that caseis 3 or more and 4 or less.

wherein R⁴ is a hydrogen atom or a methyl group, X¹ is an oxygen atom,—Y¹—X² is an alkyl group having 1 or more carbon atoms and 18 or lesscarbon atoms or an isobornyl group;

wherein R⁴ is a hydrogen atom or a methyl group, X¹ is an oxygen atom,Y¹ is a group containing 1 to 15 polyoxyalkylene groups having 2 or 3carbon atoms, and —X² is a hydrogen atom, —CH₃, or —C₂H₅;

wherein R⁴ is a hydrogen atom or a methyl group, X¹ is NH or an oxygenatom, Y¹ is an alkylene group having 1 or more carbon atoms and 3 orless carbon atoms or —C(CH₃)₂—, X² is —N(R⁵)₂ or —OR⁵, where R⁵ is ahydrogen atom or an alkyl group having 1 or more carbon atoms and 4 orless carbon atoms;

wherein R⁶ is a hydrogen atom or a methyl group, and X³ is an aromaticgroup having 6 or more carbon atoms and 12 or less carbon atoms.

As the hydrophobic cationic polymer of Component (A) described above,for example, polymers in which styrenic monomers and DMAPAA monomers arepolymerized and the like can he used.

As examples of the hydrophilic cationic polymer of Component (B)described above, a polymer described in Synthesis Example 1 of JapanesePatent Laid-Open No. Hei-08-291206 or the like can he used, and as acommercially available product, for example, HC Polymer 3A manufacturedby Osaka Organic Chemical Industries, Ltd., Plascize L-514 manufacturedby GOO CHEMICAL CO., LTD., or the like can be used.

As a commercially available product of the polymer of Component (C)described above, for example, Ultrahold Strong manufactured by BASF,Plascize L-9909B manufactured by GOO CHEMICAL CO., LTD., Tilamar FixA1000 manufactured by DSM, polyacrylic acid manufactured by FUJIFILMWako Pure Chemical Corporation, Mn: 5000, and Resyn 28-2930 manufacturedby Akzo Nobel, or the like can be used.

The cosmetic composition of the embodiment Ia described above ispreferably combinations listed in Examples 1 to 27, more preferablycombinations given in Examples 1 to I 6, and even more preferably acombination given in Example 1.

Embodiment of Ib

Ib is a cosmetic composition containing the following Components (A),(B), and (C):

-   Component (A): a hydrophobic anionic polymer which dissolves in    ethanol at 25° C. in an amount of 1% by mass or more, and has a    glass transition temperature Tg of 30° C. or higher;-   Component (B): a hydrophilic anionic polymer which dissolves in    ethanol at 25° C. in an amount of 1% by mass or more; and-   Component (C): a cationic polymer and/or a polymer having an    amphoteric group, which dissolves in ethanol at 25° C. in an amount    of 1% by mass or more.

In the above embodiment of Ib, it is preferable that

-   Component (A) is a polymer containing a constituting unit derived    from one or more members selected from acrylamide monomers having a    linear alkyl group having 1 or more carbon atoms and 12 or less    carbon atoms or a branched alkyl group having 3 or more carbon atoms    and 12 or less carbon atoms and aromatic vinyl monomers, from the    viewpoint of maintaining styling and having hygroscopic resistance;-   Component (B) is a polymer containing a constituting unit derived    from a monomer having a carboxy group; and-   Component (C) is a polymer containing a constituting unit derived    from a monomer having an amino group.

In the above embodiment of Ib, from the same viewpoint, it is morepreferable that Component (A) is prepared so that the constituting unitsrepresented by formula 1a mentioned above are contained in an amount ofpreferably 60% by mass or more, more preferably 0% by mass or more, andeven more preferably 80% by mass or more, or the constituting unitsrepresented by formula 2a mentioned above are contained in an amount ofpreferably 45% by mass or more, more preferably 50% by mass or more, andeven more preferably 60% by mass or more, or the constituting unitsrepresented by formula 3 mentioned above are contained in an amount ofpreferably 45% by mass or more, more preferably 50% by mass or more, andeven more preferably 60% by mass or more, and it is more preferable thatComponent (B) is prepared so that a total of the constituting unitsrepresented by formula 1b mentioned above, the constituting unitsrepresented by formula 2b mentioned above, and the constituting unitsrepresented by formula 2c mentioned above is contained in an amount ofpreferably 35% by mass or more, more preferably 40% by mass or more, andeven more preferably 50% by mass or more.

As commercially available products of the hydrophobic anionic polymer ofComponent (A) described above, for example, Tilamar Fix A1000manufactured by DSM, Ultrahold Strong manufactured by BASF, PlascizeL-9909B manufactured by GOO CHEMICAL CO., LTD. can be used. Ascommercially available products of the hydrophilic anionic polymer ofComponent (B) described above, for example, Resyn 28-2930 manufacturedby Akzo Nobel or the like can be used. As commercially availableproducts of the polymer of Component (C) described above, for example,HC Polymer 3A manufactured by Osaka Organic Chemical Industries, Ltd.,Plascize L-514 manufactured by GOO CHEMICAL CO., LTD., or the like canbe used.

Embodiment of IIa

IIa is a cosmetic composition containing the following Components (A),(B), and (C):

-   Component (A): a hydrophobic nonionic polymer which dissolves in    ethanol at 25° C. in an amount of 1% by mass or more, and has a    glass transition temperature Tg of 30° C. or higher;-   Component (B): a hydrophilic cationic polymer which dissolves in    ethanol at 25° C. in an amount of 1% by mass or more; and-   Component (C): an anionic polymer and/or a polymer having an    amphoteric group, which dissolves in ethanol at 25° C. in an amount    of 1% by mass or more.

In the above embodiment of IIa, from the viewpoint of maintainingstyling and having hygroscopic resistance, it is preferable thatComponent (A) is a nonionic polymer containing a constituting unitderived from one or more members selected from acrylamide monomershaving a linear alkyl group having 1 or more carbon atoms and 12 or lesscarbon atoms or a branched alkyl group having 3 or more carbon atoms and12 or less carbon atoms and aromatic vinyl monomers,

-   Component (B) is a polymer containing a constituting unit derived    from a monomer having an amino group; and-   Component (C) is a polymer containing a constituting unit derived    from a monomer having a carboxy group.

In the above embodiment of IIa, from the same viewpoint, it is morepreferable that Component (A) is prepared so that the constituting unitsrepresented by formula la mentioned above are contained in an amount ofpreferably 56% by mass or more, more preferably 60% by mass or more, andeven more preferably 70% by mass or more, or the constituting unitsrepresented by formula 2a mentioned above are contained in an amount ofpreferably 45% by mass or more, more preferably 50% by mass or more, andeven more preferably 60% by mass or more, or the constituting unitsrepresented by formula 3 mentioned above are contained in an amount ofpreferably 45% by mass or more, more preferably 50% by mass or more, andeven more preferably 60% by mass or more, and it is more preferable thatComponent (B) is prepared so that a total of the constituting unitsrepresented by formula lb mentioned above, the constituting unitsrepresented by formula 2b mentioned above, and the constituting unitsrepresented by formula 2c mentioned above is contained in an amount ofpreferably 44% by mass or more, more preferably 50% by mass or more, andeven more preferably 60% by mass or more.

As a commercially available product of the hydrophobic nonionic polymerof Component (A) described above, for example, S-LEC BM-1 manufacturedby SEKISUI CHEMICAL CO., LTD., or the like can be used.

As examples of the hydrophilic cationic polymer of Component (B)described above, a polymer described in Synthesis Example 1 of JapanesePatent Laid-Open No. Hei408-291206 or the like can be used, and as anexample of a commercially available product, HC Polymer 3A manufacturedby Osaka Organic Chemical Industries, Ltd., or Plascize L-514manufactured by GOO CHEMICAL CO., LTD. can be used.

As the anionic polymer of Component (C) described above, a polyacrylicacid can also be used, and examples of commercially available productsinclude Ultrahold Strong manufactured by BASF, Plascize L-9909Bmanufactured by GOO CHEMICAL CO., LTD., Tilamar Fix A1000 manufacturedby DSM, polyacrylic acid manufactured by FUJIFILM Wako Pure ChemicalCorporation, Mn: 5000, and Resyn 28-2930 manufactured by Akzo Nobel, orthe like can be used.

As the cosmetic composition of the embodiment IIa described above,combinations given in Examples 28 and 29 are preferred.

Embodiment of IIb

IIb is a cosmetic composition containing the following Components (A),(B), and (C):

-   Component (A): a hydrophobic nonionic polymer which dissolves in    ethanol at 25° C. in an amount of 1% by mass or more, and has a    glass transition temperature Tg of 30° C. or higher;-   Component (B): a hydrophilic anionic polymer which dissolves in    ethanol at 25° C. in an amount of 1% by mass or more; and-   Component (C): a cationic polymer and/or a polymer having an    amphoteric group, which dissolves in ethanol at 25° C. in an amount    of 1% by mass or more.

In the above embodiment of IIb, from the viewpoint of maintainingstyling and having hygroscopic resistance, it is preferable thatComponent (A) is a nonionic polymer containing a constituting unitderived from one or more members selected from acrylamide monomershaving a linear alkyl group having 1 or more carbon atoms and 12 or lesscarbon atoms or a branched alkyl group having 3 or more carbon atoms and12 or less carbon atoms and aromatic vinyl monomers,

-   Component (B) is a polymer containing a constituting unit derived    from a monomer having a carboxy group; and-   Component (C) is a polymer containing a constituting unit derived    from a monomer having an amino group.

In the above embodiment of IIb, from the same viewpoint, it is morepreferable that Component (A) is prepared so that the constituting unitsrepresented by formula 1a mentioned above are contained in an amount ofpreferably 56% by mass or more, more preferably 60% by mass or more, andeven more preferably 70% by mass or more, or the constituting unitsrepresented by formula 2a mentioned above are contained in an amount ofpreferably 45% by mass or more, more preferably 50% by mass or m andeven more preferably 60% by mass or more, or the constituting unitsrepresented by formula 3 mentioned above are contained in an amount ofpreferably 45% by mass or more, more preferably 50% by mass or more, andeven more preferably 60% by mass or more, and it is more preferable thatComponent (B) is prepared so that a total of the constituting unitsrepresented by formula 1b mentioned above, the constituting unitsrepresented by formula 2b mentioned above, arid the constituting unitsrepresented by formula 2c mentioned above is contained in an amount ofpreferably 44% by mass or more, more preferably 50% by mass or more, andeven more preferably 60% by mass or more.

As a commercially available product of the hydrophobic nonionic polymerof Component (A), for example, S-LEC BM-1 manufactured by SEKISUICHEMICAL CO., LTD., or the like can be used.

As a commercially available product of the hydrophilic anionic polymerof Component (B) described above, for example, Resyn 28-2930manufactured by Akzo Nobel, or the like can be used.

As a commercially available product of the cationic polymer of Component(C) described above, for example, HC Polymer 3A manufactured by OsakaOrganic Chemical Industries, Ltd., Plascize L-514 manufactured by GOOCHEMICAL CO., LTD., or the like can be used.

[Other Optional Components]

The cosmetic composition of the present invention can optionally furthercontain various components used in ordinary hair cosmetics, including,for example, a cationic surfactant, an anionic surfactant, a nonionicsurfactant, or an amphoteric surfactant, other than Components (A), (B)and (C), a pH adjusting agent, vitamins, a protein, amino acids, crudemedicines, an anticorrosive (a preservative), an ultraviolet absorbent,an antioxidant, a colorant or the like.

The cosmetic composition of the present invention may further contain amedium. The medium which is usable includes water; alcohols such asethanol, isopropanol, and glycerol; and the like. These media may beused alone in a single kind or may be used in a mixture of two or morekinds. Among these media, ethanol is preferred, from the viewpoint ofsafety to human bodies. The amount of the medium in the cosmeticcomposition is preferably 4% by mass or more, more preferably 30% bymass or more, and even more preferably 50% by mass or more, and on theother hand, the amount is preferably 98.4% by mass or less, morepreferably 98% by mass or less, and even more preferably 95% by mass orless.

The cosmetic composition of the present invention can be used in, forexample, a cosmetic composition for hair, eyelashes, or the like. Amongthem, it is preferable to use the cosmetic composition as a haircosmetic composition. The present invention also provides a method ofhair styling, including applying a cosmetic composition of the presentinvention to hairs.

[Cosmetics]

The cosmetic composition of the present invention is preferably used ascosmetics such as hair styling agents and hair conditioning agents.

With respect to the above-mentioned embodiments, the present inventionfurther discloses cosmetic compositions and a method of hair stylinggiven below.

-   <1> A cosmetic composition containing the following Components (A),    (B), and (C):-   Component (A): a hydrophobic polymer which dissolves in ethanol at    25° C. in an amount of 1% by mass or more, and has a glass    transition temperature Tg of 30° C. or higher, the polymer having    the same electric charge as the following Component (B), or not    having an electric charge;-   Component (B): a hydrophilic ionic polymer which dissolves in    ethanol at 25° C. in an amount of 1% by mass or more; and-   Component (C): an ionic polymer which dissolves in ethanol at 25° C.    in an amount of 1% by mass or more, the ionic polymer having a    different kind of an electric charge to that of the Component (B).-   <2> The cosmetic composition according to the above <1>, wherein    Component (B) is a cationic polymer, and Component (C) is an.    anionic polymer and/or a polymer having an amphoteric group.-   <3> The cosmetic composition according to the above <2>, wherein    Component (A) is a cationic polymer or a nonionic polymer.-   <4> The cosmetic composition according to the above <1>, wherein    Component (B) is an anionic polymer, and Component (C) is a cationic    polymer and/or a polymer having an amphoteric group.-   <5> The cosmetic composition according to the above <4>, wherein    Component (A) is an anionic polymer or a nonionic polymer.-   <6> The cosmetic composition according to any one of the above <1>    to <5>, wherein the weight-average molecular weight of Component (A)    is preferably 5000 or more and 500000 or less.-   <7> The cosmetic composition according to any one of the above <1>    to <6>, wherein the weight-average molecular weight of Component (A)    is more preferably 20000 or more and 450000 or less, and even more    preferably 100000 or more and 350000 or less.-   <8> The cosmetic composition according to any one of the above <1>    to <7>, wherein Component (A), (B) and/or (C) has one or more groups    selected from alkylamide groups and aminoalkylamide groups.-   <9> The cosmetic composition according to any one of the above <1>    to <8>, wherein Component (A), (B) and/or (C) has one or more    constituting units selected from formula 1, formula 2, and formula 3    given below:

wherein R¹ is a hydrogen atom or a methyl group; and each of R² and R³is independently a hydrogen atom or a hydrocarbon group having 1 or morecarbon atoms and 12 or less carbon atoms which may have a substituent,with proviso that

when either one of R² or R³ is a hydrogen atom, the other is ahydrocarbon group having 1 or more carbon atoms and 12 or less carbonatoms, and

when both R² and R³ are not a hydrogen atom, they are hydrocarbon groupshaving a total number of carbon atoms of R² and R³ of 7 or more and 24or less;

alternatively, R² and R³ may be bound to each other to form a ringstructure, and a total number of carbon atoms of R² and R³ in that caseis 3 or more and 24 or less;

wherein R⁴ is a hydrogen atom or a methyl group;

if X¹ is an oxygen atom, ——Y¹—X² is a group selected from an alkyl grouphaving 1 or more carbon atoms and 18 or less carbon atoms, an isobornylgroup, —(CH₂)_(p)—N(R⁵)₂, —(CH₂)_(p)—OR⁵, —C(CH₃)₂—N(R⁵)₂, and—C(CH₃)₂—OR⁵, where p is 1 or more and 3 or less, and R⁵ is a hydrogenatom or an alkyl group having I or more carbon atoms and 4 or lesscarbon atoms;

alternatively, Y¹ is a group containing 1 to 15 polyoxyalkyene groupshaving 2 or 3 carbon atoms, X² is a hydrogen atom, —CH₃, or —C₂H₅, or

if X¹ is NH,

Y¹ is an alkylene group having I or more carbon atoms and 3 or lesscarbon atoms, X² is —N(R⁵)₂, wherein R⁵ is a hydrogen atom or an alkylgroup having 1 or more carbon atoms and 4 or less carbon atoms; and

wherein R⁶ is a hydrogen atom or a methyl group, and X³ is an aromaticgroup having 6 or more carbon atoms and 12 or less carbon atoms.

-   <10> The cosmetic composition according to any one of the above <1>    to <9>, wherein the mass ratio of Component (A) to Component (B)    (Component (A)/Component (B)) is 0.1 or more and 5.0 or less.

<11> The cosmetic composition according to any one of the above <1> to<10>, wherein the mass ratio of Component (A) to Component (B)(Component (A)/Component (B)) is more preferably 0.5 or more and 3.0 orless, and even more preferably 0.8 or more and 1.5 or less.

-   <12> The cosmetic composition according to any one of the above <1>    to <11>, wherein the proportion of the content of Component (C) in a    total content of Components (A), (B), and (C) (Component    (C)/(Components (A)+(B)+(C))) is 0.05% by mass or more and 50% by    mass or less.-   <13> The cosmetic composition according to any one of the above <1>    to <12>, wherein the content of Component (C), in terms of % by    mass, in a total of Components (A), (B), and (C) in the cosmetic    composition is more preferably 0.1% by mass or more and 15% by mass    or less, and even more preferably 0.5% by mass or more and 5% by    mass or less.-   <14> The cosmetic composition according to any one of the above <1>    to <13>, wherein the amount of the amine or the amount of the    carboxylic acid in Component (A) is 1% by mass or more and 50% by    mass or less.-   <15> The cosmetic composition according to any one of the above <1>    to <14>, wherein the amount of the amine in a case where    Component (A) is a cationic polymer is more preferably 3% by mass or    more and 35% by mass or less, even more preferably 5% by mass or    more and 30% by mass or less, and still even more preferably 5% by    mass or more and 20% by mass or less.-   <16> The cosmetic composition according to any one of the above <1>    to <14>, wherein the amount of the carboxylic acid in a case where    Component (A) is an anionic polymer is more preferably 3% by mass or    more and 35% by mass or less, even more preferably 5% by mass or    more and 30% by mass or less, and still even more preferably 5% by    mass or more and 20% by mass or less.-   <17> The cosmetic composition according to any one of the above <1>    to <16>, wherein the amount of the amine or the amount of the    carboxylic acid in Component (B) is 1% by mass or more and 60% by    mass or less.-   <18> The cosmetic composition according to any one of the above <1>    to <17>, wherein the amount of the amine in a case where    Component (B) is a cationic polymer is more preferably 5% by mass or    more and 45% by mass or less, and even more preferably 10% by mass    or more and 35% by mass or less.-   <19> The cosmetic composition according to any one of the above <1>    to <17>, wherein the amount of the carboxylic acid in a case where    Component (B) is an anionic polymer is more preferably 5% by mass or    more and 45% by mass or less, and even more preferably 10% by mass    or more and 35% by mass or less.-   <20> The cosmetic composition according to any one of the above <1>    to <19>, wherein the cosmetic composition further contains one or    more media selected from the group consisting of water, ethanol,    isopropanol, and glycerol, wherein the amount of the medium in the    cosmetic composition is preferably 4% by mass or more and 98.4% by    mass or less, more preferably 30% by mass or more and 98% by mass or    less, and even more preferably 50% by mass or more and 95% by mass    or less.-   <21> The cosmetic composition according to any one of the above <1>    to <20>, wherein ethanol is used as the medium.

<22> The cosmetic composition according to any one of the above <1> to<21>, for use in hair.

-   <23> The cosmetic composition according to any one of the above <1>    to <22>, wherein the glass transition point Tg of Component (A) is    preferably 30° C. or higher and 180° C. or lower, more preferably    40° C. or higher and 150° C. or lower, even more preferably 50° C.    or higher and 130° C. or lower, still even more preferably 60° C. or    higher and 130° C. or lower, and still even more preferably 70° C.    or higher and 130° C. or lower.-   <24> The cosmetic composition according to any one of the above <1>    to <23>, wherein the content of Component (A) in the cosmetic    composition is preferably 5% by mass or more and 83% by mass or    less, more preferably 28% by mass or more and 75% by mass or less,    and even more preferably 42% by mass or more and 60% by mass or    less.-   <25> The cosmetic composition according to any one of the above <1>    to <24>, wherein the glass transition point Tg of Component (B) is    preferably 0° C. or higher and 130° C. or lower, more preferably    10° C. or higher and 120° C. or lower, even more preferably 25° C.    or higher and 100° C. or lower, and still even more preferably    40° C. or higher and 100° C. or lower.-   <26> The cosmetic composition according to any one of the above <1>    to <25>, wherein the weight-average molecular weight of    Component (B) is preferably 5000 or more and 500000 or less, more    preferably 20000 or more and 450000 or less, and even more    preferably 100000 or more and 350000 or less.-   <27> The cosmetic composition according to any one of the above <1>    to <26>, wherein the content of Component (B) in the cosmetic    composition is preferably 10% by mass or more and 91% by mass or    less, more preferably 21% by mass or more and 67% by mass or less,    and even more preferably 38% by mass or more and 55% by mass or    less.-   <28> The cosmetic composition according to any one of the above <1>    to <27>, wherein the glass transition point Tg of Component (C) is    preferably 20° C. or higher and 180° C. or lower, more preferably    30° C. or higher and 150° C. or lower, even more preferably 40° C.    or higher and 130° C. or lower, and still even more preferably    45° C. or higher and 130° C. or less.-   <29> The cosmetic composition according to any one of the above <1>    to <28>, wherein the weight-average molecular weight of    Component (C) is preferably 500 or more and 800000 or less, more    preferably 1000 or more and 600000 or less, and even more preferably    2000 or more and 400000 or less.-   <30> The cosmetic composition according to any one of the above <1>    to <29>, wherein the content of Component (C) in the cosmetic    composition is preferably 0.05% by mass or more and 50% by mass or    less, more preferably 0.1% by mass or more and 15% by mass or less,    and even more preferably 0.5% by mass or more and 5% by mass or    less.-   <31> The cosmetic composition according to any one of the above <1>    to <30>, wherein the cosmetic composition contains the following    Components (A), (B), and (C):-   Component (A): a hydrophobic cationic polymer which dissolves in    ethanol at 25° C. in an amount of 1% by mass or more, and has a    glass transition temperature Tg of 30° C. or higher;-   Component (B): a hydrophilic cationic polymer which dissolves in    ethanol. at 25° C. in an amount of 1% by mass or more; and-   Component (C): an anionic polymer and/or a polymer having an    amphoteric group, which dissolves in ethanol at 25° C. in an amount    of 1% by mass or more.-   <32> The cosmetic composition according to any one of the above <1>    to <30>, wherein the cosmetic composition contains the following    Components (A), (B), and (C):-   Component (A): a hydrophobic anionic polymer which dissolves in    ethanol at 25° C. in an amount of 1% by mass or more, and has a    glass transition temperature Tg of 30° C. or higher;-   Component (B): a hydrophilic anionic polymer which dissolves in    ethanol at 25° C. in an amount of 1% by mass or more; and-   Component (C): a cationic polymer and/or a polymer having an    amphoteric group, which dissolves in ethanol at 25° C. in an amount    of 1% by mass or more.-   <33> The cosmetic composition according to any one of the above <1>    to <30>, wherein the cosmetic composition contains the following    Components (A), (B), and (C):-   Component (A): a hydrophobic nonionic polymer which dissolves in    ethanol at 25° C. in an amount of 1% by mass or more, and has a    glass transition temperature Tg of 30° C. or higher;-   Component (B): a hydrophilic cationic polymer which dissolves in    ethanol at 25° C. in an amount of 1% by mass or more; and-   Component (C): an anionic polymer and/or a polymer having an    amphoteric group, which dissolves in ethanol at 25° C. in an amount    of 1% by mass or more.-   <34> The cosmetic composition according to any one of the above <1>    to <30>, wherein the cosmetic composition contains the following    Components (A), (B), and (C):-   Component (A): a hydrophobic nonionic polymer which dissolves in    ethanol at 25° C. in an amount of 1% by mass or more, and has a    glass transition temperature Tg of 30° C. or higher;-   Component (B): a hydrophilic anionic polymer which dissolves in    ethanol at 25° C. in an amount of 1% by mass or more; and-   Component (C): a cationic polymer and/or a polymer having an    amphoteric group, which dissolves in ethanol at 25° C. in an amount    of 1 by mass or more.

<35> A method of styling hair, including applying a cosmetic compositionas defined in any one of the above <1> to <34> to hair.

EXAMPLES

The present invention will be described more specifically by means ofthe following Examples and the like. Here, the Examples and the like aremere exemplifications of the present invention, without intending tolimit the present invention thereto. Parts in Examples are parts by massunless specified otherwise. Here, “ambient pressure” means 101.3 kPa,and “room temperature” means 25° C.

<Measurement of Weight-Average Molecular Weight Mw>

A weight-average molecular weight Mw was obtained by gel permeationchromatography (GPC) under the following conditions. Here, the eluent inthe measurement of an anionic polymer was a solution of 60 mM phosphoricacid and 50 mM lithium bromide in an N,N-dimethylformamide solution.

<Measurement Conditions for GPC>

-   Columns; two columns of “α-M,” manufactured by Tosoh Corporation    being connected in a series upon use;

an eluent: 50 mM lithium bromide in an N,N-dimethylformamide solution;

a flow rate: 1.0 mL/min;

a column temperature: 40° C.;

a detector: RI;

a sample: 5 mg/mL N,N-dimethylformamide solution, 100 μL; and

a calibration curve: molecular weights of polystyrenes: 8420000,1090000, and 96400 manufactured by Tosoh Corporation, molecular weightof polystyrene: 30000 manufactured by Nishio Kogyo Kabushiki Kaisha, andmolecular weights of polystyrenes: 5400 and 500 manufactured by TosohCorporation.

<Glass Transition Temperature>

The glass transition temperatures for the polymers synthesized in thepresent application were calculated using the FOX formula in accordancewith the initially charged compositional ratio. The glass transitiontemperatures of commercially available polymers were measured withdifferential scanning colorimetry (DSC) under the following conditions.The FOX formula is a relational formula of a glass transitiontemperature (Tg) of a copolymer and a glass transition temperature (Tgi)of a homopolymer in which each of the monomers constituting thecopolymer is homopolymerized, as represented by the following formula:

1/Tg=Σ(Wi/Tgi)

wherein Tg: a glass transition temperature (K) of a copolymer;

-   Tgi: a glass transition temperature (K) of a homopolymer of a    monomer i; and-   Wi: a weight percentage of the monomer i in the copolymer.

Measurement apparatus: DSC 7020, manufactured by Hitachi High-TechScience Corporation;

-   Temperature profiles: A glass transition temperature was obtained    from 2nd heating under the following temperature profiles:-   1st heating: heating from 25° C. to 150° C. at a rate of 50° C./min,    and holding thereat for 10 minutes,-   1st cooling: cooling from 150° C. to 25° C. at a rate of 10° C./min,    and holding thereat for 10 minutes,-   2nd heating: heating from 25° C. to 150° C. at a rate of 10° C./min,    and holding thereat for 10 minutes, and-   2nd cooling: cooling from 150° C. to 25° C. at a rate of 10° C./min,    and holding thereat for 10 minutes.

<Amount of Amine in Commercially Available Product>

The amount of the amine was calculated from an areal ratio of peaks withthe internal standard in accordance with NMR measurement, except forPolymer b9 described later.

Solvent: Chloroform-d, manufactured by FUJIFILM Wako Pure ChemicalCorporation;

Integration count: 32 times;

Relaxation time: 10 seconds; and

Internal standard: p-dinitrobenzene manufactured by FUJIFILM Wako PureChemical Corporation.

<Measurement of Amount of Amine of Polymer b9>

The amount of an amine was obtained by colloid titration. Specifically,the amount of an amine was obtained as follows.

A 0.1 g sample was weighed in a volumetric flask, and filled up to alevel of 100 mL with ion-exchanged water (a solution 1). In a 100 mLbeaker, 10 mL of the solution I was measured and taken, and 20 mL ofion-exchanged water was added thereto. The mixed solution was titratedwith a potassium polyvinyl sulfate solation (N/400, Factor: 1.0),manufactured by FUJIFILM Wako Pure Chemical Corporation, and an endpointof the titration was judged with Toluidine blue manufactured by FUJIFILMWako Pure Chemical Corporation, at a point where colors change from blueto red-purple. The amount of the amine was calculated from the titratedamount.

Amount of Amine, mmol/g=(1/400×F×X)/Y

-   F: Factor of a titrated solution of potassium polyvinyl sulfate    (N/400);-   X: A titrated amount (mL) of a titrated solution of potassium    polyvinyl sulfate (N/400); and.-   Y: A sample mass (mg)

<Amount of Carboxylic Acid Commercially Available Product>

A 10 g sample was taken, 30 mL of a mixed solvent (remark 1) was addedthereto, the mixture was heated to dissolve, and a mixed solution wastitrated with a 0.1 mol/L potassium hydroxide ethanol solution (remark2), while occasionally shaking and mixing the solution. The endpoint ofthe titration was defined as a point where a pale red color of thesolution was continued for 30 seconds (indicator: several drops of aphenolphthalein solution (remark 3)). An empty test was carried out inthe same manner, and compensated therewith.

Acid value=a×5.611/b

-   a: An amount of a 0.1 mol/L potassium hydroxide ethanol solution    consumed, mL; and-   b: An amount of the sample, g.-   (remark 1) Mixed solvent: Several drops of a phenolphthalein    solution was added as an indicator (remark 3) to a toluene/ethanol    liquid mixture (2:1), both manufactured by FUJIFILM Wako Pure    Chemical Corporation. Immediately before use the liquid mixture was    neutralized with a 0.1 mol/L potassium hydroxide ethanol solution    (remark 2) until the colors changed to a pale red color.-   (remark 2) A 0.1 mol/L potassium hydroxide ethanol solution:    manufactured by KATAYAMA CHEMICAL, LTD., or an equivalent    commercially available product.-   (remark 3) Phenolphthalein solution: One gram of Phenolphthalein    manufactured by FUJIFILM Wako Pure Chemical Corporation was    dissolved in 90 mL of ethanol and 10 mL of water.

<Measurement of Amount of Polymer Dissolved in Ethanol>

The measurement of the amount of the polymer dissolved in ethanol asused herein was carried out as follows.

A polymer was added to 1 L of ethanol at 25° C. so as to have aconcentration of 1% by mass, the mixture was stirred at 50 rpm for 3minutes, and the mixture was then filtered with a No. 2 filter paper. Itwas judged that the polymer dissolves in an amount of 1% by mass or morein ethanol at 25° C., if insoluble remnants do not remain on the filterpaper in an amount of 0.1 g or more.

Preparation of Polymers a1, a5 to a11, and b1 to b6

A four-neck flask equipped with a reflux condenser, a liquid pumpingdevice, a thermometer, a nitrogen gas inlet tube, and an agitatingdevice was heated with an oil bath at 50° C. The monomers of whichconstituting ratios were shown in Table 1-A were dissolved in 75 to 100parts by mass of ethanol (213 parts by mass of ethanol, only for all) soas to contain 100 parts by mass of the monomers. In addition, 0.2 mol %of an initiator V-65B was dissolved in the monomer solution so as tohave a concentration of 5% by mass based on the monomers. The abovemonomer solution and the initiator solution were added dropwiseconcurrently to the flask over 130 minutes under a nitrogen atmosphere,and the mixture was kept at 50° C. for 130 minutes, and further held at80° C. for 120 minutes, to carry out the reaction. After thepolymerization, the ethanol solution of the polymer was poured inn-hexane (only a5, in a mixed solvent of ethanol/water=25/75 vol %) toallow reprecipitation and purification, and the product was vacuum-driedat 80° C.

Preparation of Polymers a2 to a4 and a12

A four-neck flask equipped with a reflux condenser, a dropping funnel, athermometer, a nitrogen gas inlet tube, and an agitating device washeated with an oil bath at 75° C. One hundred parts by mass of themonomers of which constituting ratios were shown in Table 1-A, and aninitiator AIBN in an amount of 0.2 mol % based on the monomers weredissolved in 43 to 67 parts by mass of toluene. The above solution wasadded dropwise to the flask over 2 hours under a nitrogen atmosphere,further held at 75° C. for 2 to 4 hours, to carry out the reaction.After the polymerization, the toluene solution of the polymer was pouredin n-hexane (only for a3, in dimethyl sulfoxide) to allowreprecipitation and purification, and the product was vacuum-dried at80° C.

Polymer a13

S-LEC BM-1 manufactured by SEKISUI CHEMICAL CO., LTD., Mw: 40000, Tg:67° C. was used.

Polymer a14

Tilamar Fix A1000 manufactured by DSM, Mw: 120000, and Tg: 98° to 108°C. was used.

Polymer a15

Polybutyl acrylate manufactured by Sigma-Aldrich, Mw: 60000, and Tg:−49°C. was used.

Polymer b7

Plascize L-514 manufactured by GOO CFIEMICAL CO., LTD. was used.

Polymer b8:

Resyn 28-2930 manufactured by Akzo Nobel was used.

Polymer b9

HC Polymer 3A, manufactured by Osaka Organic Chemical Industries, Ltd.was used.

Polymer c1

Ultrahold Strong manufactured by BASF was used.

Preparation of Polymer c2

A solution prepared by dissolving 100 parts by mass of the monomers ofwhich constituting ratios were as shown in Table 1-A in 388 parts bymass of ethanol was added to a four-neck flask equipped with a refluxcondenser, a thermometer, a nitrogen gas inlet tube, and an agitatingdevice, and the contents were heated with an oil bath at 50° C. Further,a solution prepared by dissolving 0.2 mol % of an initiator V-65B basedon the monomers in 12 parts by mass of ethanol was added to the flask,and the reaction was carried out in the flask under a nitrogenatmosphere. After the polymerization, the ethanol solution of thepolymer was poured in n-hexane to allow reprecipitation andpurification, and the product was vacuum-dried at 80° C. Polymer c3

Resyn 28-2930 manufactured by Akzo Nobel was used.

Polymer c4

Plascize L-9909B manufactured by GOO CHEMICAL CO., LTD. was used.

Polymer c5

Tilamar Fix A1000 manufactured by DSM was used.

Polymer c6

Polyacrylic acid manufactured by FUJIFILM Wako Pure ChemicalCorporation, Mn: 5000 was used.

Polymer c7

Plascize L-514 manufactured by GOO CHEMICAL CO., LTD. was used.

Preparation of Polymer c8

A four-neck flask equipped with a reflux condenser, a liquid pumpingdevice, a thermometer, a nitrogen gas inlet tube, and an agitatingdevice was heated with an oil bath at 83° C. The monomers of whichconstituting ratios were shown in Table 1-A were dissolved in 226 partsby mass of ethanol so as to contain 100 parts by mass of the monomers.In addition, 0.2 mol % of an initiator V-65B was dissolved in theethanol solution so as to have a concentration of 7% by mass based onthe monomers. The above monomer solution and the initiator solution wereadded dropwise concurrently to the flask over 130 minutes under anitrogen atmosphere, to carry out the reaction. After thepolymerization, the ethanol solution of the polymer was poured inn-hexane to allow reprecipitation and purification, and the product wasvacuum-dried at 80° C.

TABLE 1-A TBAA, St, MMA, IBAA, OctAAm, DMPAA, PEGMA, DMAA, EA, AA,DMAEMA, % by % by % by % by % by % by % by % by % by % by % by % by MassMass Mass Mass Mass Mass Mass Mass Mass Mass Mass Mw Tg, ° C. Polymer a170 0 0 0 0 5 10 15 0 0 0 190,000 96 Polymer a2 0 45 0 0 0 5 10 40 0 0 0100,000 83 Polymer a3 0 0 45 0 0 5 10 40 0 0 0 340,000 81 Polymer a4 0 00 70 0 5 10 15 0 0 0 320,000 71 Polymer a5 0 0 0 0 70 5 10 15 0 0 0370,000 84 Polymer a6 65 0 0 0 0 5 20 10 0 0 0 400,000 50 Polymer a7 580 0 0 0 5 20 17 0 0 0 340,000 40 Polymer a8 70 0 0 0 0 5 10 15 0 0 040,000 96 Polymer a9 70 0 0 0 0 30 0 0 0 0 0 200,000 121 Polymer a10 740 0 0 0 0 11 16 0 0 0 250,000 82 Polymer a11 97 0 0 0 0 0 0 0 0 3 0100,000 134 Polymer a12 0 45 0 0 0 0 0 50 0 0 5 114,000 108 Polymer b155 0 0 0 0 15 10 0 20 0 0 250,000 61 Polymer b2 55 0 0 0 0 2 20 23 0 0 0250,000 61 Polymer b3 26 0 0 0 0 7 0 67 0 0 0 200,000 124 Polymer b432.4 0 0 0 0 50 5.9 11.8 0 0 0 230,000 87 Polymer b5 52 0 0 0 0 30 7 110 0 0 220,000 96 Polymer b6 59.8 0 0 0 0 0 10.9 0 21.8 7.5 0 240,000 58Polymer c2 60 0 0 0 0 10 0 0 30 0 0 60,000 55 Polvmer c8 20 0 0 0 0 0 080 0 0 0 20,000 122

Here, it was confirmed that as to the transmittance of Polymers a1 toa15 and b1 to b9 mentioned above, all of a1 to a2 and a4 to a15 wereless than 80%, and that all of b1 to b9 were 80% or more.

Further, it was confirmed that the amount of Polymers a1 to a15, b1 tob9, and c1 to c8 mentioned above dissolved in ethanol at 25° C. allexceeded 1% by mass. Also, Table 1-B shows the visual observationresults of the external appearances of a 1% by mass ethanol solution at25° C. This ethanol solution is a cosmetic composition, where ethanol isa medium. Here, in Table 1-B, N means nonionic, A means anionic, and Cmeans cationic.

TABLE 1-B External appearance of 1% by mass Electric ethanol solution at25° C. charge Polymer al Transparent C Polymer a2 Transparent C Polymera3 Transparent C Polymer a4 Transparent C Polymer a5 Transparent CPolymer a6 Transparent C Polymer a7 Transparent C Polymer a8 TransparentC Polymer a9 Transparent C Polymer a10 Transparent N Polymer a11Transparent A Polymer a12 Transparent C Polymer a13 Transparent NPolymer a14 Transparent A Polymer at15 Transparent N Polymer b1Transparent C Polymer b2 Transparent C Polymer b3 Transparent C Polymerb4 Transparent C Polymer b5 Transparent C Polymer b6 Transparent APolymer b7 Transparent C Polvrner b8 Transparent A Polymer b9Transparent C Polymer c1 Transparent A Polymer c2 Transparent C Polymerc3 Transparent A Polymer c4 Transparent A Polymer c5 Transparent APolymer c6 Transparent A Polymer c7 Transparent C Polymer c8 TransparentN

The details of the raw materials shown in Table 1-A and Examples and thelike are as follows.

-   TBAA: N-tert-Butyl acrylamide, manufactured by MCC Unitec K.K.-   St: Styrene, manufactured by FUJIFILM Wako Pure Chemical Corporation-   MMA: Methyl methacrylate, manufactured by FUJIFILM Wako Pure    Chemical Corporation-   IBAA: Isobornyl acrylate, manufactured by Tokyo Chemical Industry    Co., Ltd.-   OctAAm: tert-Octyl acrylamide, manufactured by Vinati Organics    Limited-   DMPAA: N,N-Dimethylaminopropyl acrylamide, manufactured by KJ    Chemicals Corporation-   PEGMA: Polyethylene glycol monomethacrylate, average number of moles    of ethylene oxide: 9, manufactured by Shin-Nakamura Chemical Co.,    Ltd., NK Ester M-90G-   DMAA: Dimethylacrylamide, manufactured by KJ Chemicals Corporation-   EA: Ethyl acrylate, manufactured by FUJIFILM Wako Pure Chemical    Corporation-   AA: Acrylic acid, manufactured by FUJIFILM Wako Pure Chemical    Corporation-   V-65B: 2,2′-Azobis-(2,4-dimethylvaleronitrile), manufactured by    FUJIFILM Wako Pure Chemical Corporation-   AIBN: Azobisisobutyronitrile, manufactured by FUJIFILM Wako Pure    Chemical Corporation-   Ethanol: manufactured by FUJIFILM Wako Pure Chemical Corporation-   n-Hexane: manufactured by FUJIFILM Wako Pure Chemical Corporation.-   Toluene: manufactured by FUJIFILM Wako Pure Chemical Corporation-   Dimethyl sulfoxide: manufactured by FUJIFILM Wako Pure Chemical    Corporation-   Ultrahold Strong: Acrylate/Acrylamide Copolymer, manufactured by    BASF-   DMAEMA: Dimethylamino)ethyl methacrylate, manufactured by FUJIFILM    Wako Pure Chemical Corporation-   Plascize L-514: POLYQUATERNIUM-99, manufactured by GOO CHEMICAL CO.,    LTD.-   Tilamar Fix A1000: Acrylates Copolymer, manufactured by DSM-   Resyn 28-2930: VA/CROTONATES/VINYL NEODECANOATE COPOLYMER,    manufactured by Akzo Nobel-   Plascize L-990913: (Acrylates/Alkyl(C1-18) Acrylates/Alkyl(C1-8)    Acrylamides) Copolymer AMP, manufactured by GOO CHEMICAL CO., LTD.

Example 1

Ethanol was added to Polymer a1, and lactic acid was added thereto in anamount of 90 mol % based on the amount of the amine of Polymer a1, toprovide a composition containing Component (A), The amount of ethanol atthis time is an amount necessary to adjust its concentration to 10% bymass,

Ethanol was added to each of Polymer b1 and Polymer b2, and lactic acidwas added thereto in an amount of 90 mol % based on the amount of theamine of Polymers b1 and b2, to provide each of the compositionscontaining Component (B). The amount of ethanol at this time is anamount necessary to adjust its concentration to 10% by mass.

Ethanol was added to Polymer c1 so as to have a concentration of 10% bymass, to provide a, composition containing Component (C).

To ethanol were added a composition containing Component (A), and acomposition containing Component (B) to be included in amounts as listedin Table 2, the mixture was homogeneously mixed, and a compositioncontaining Component (C) was then added thereto to be included in anamount as listed in Table 1-A, to provide a composition containingComponents (A), (B), and (C). The amount of ethanol at this time is anamount necessary to adjust its concentration to 5% by mass.

Ethanol was further added to a composition containing Components (A),(B), and (C) so as to have a concentration of 0.5% by mass, to provide acosmetic composition.

Examples 2 to 29 and Comparative Examples 1 to 3

The same procedures as in Example 1 were carried out except that each ofthe polymers listed in Tables 2 to 7 and 9 was used, to provide each ofcosmetic compositions. Here, lactic acid was added in an amount of 15mol % based on the amount of the amine of Polymer a9 to prepare acomposition, for the preparation of a composition containing Component(A) in Example 20; lactic acid was added in an amount of 21 mol % basedon the amount of the amine of Polymer b4 to prepare a composition, forthe preparation of a composition containing Component (B) in Example 22;lactic acid was added in an amount of 35 mol % based on the amount ofthe amine of Polymer b5 to prepare a composition, for the preparation ofa composition containing Component (B) in Example 23; lactic acid wasadded in an amount of 230 mol % based on the amount of the amine ofPolymer a12 to prepare a composition, for the preparation of acomposition containing Component (A) in Example 24. In addition, lacticacid was not added for a nonionic polymer and a quaternary ammonium.salt.

Examples 30 and 31

The same procedures as in Example 1 were carried out except that apolymer listed in Table 8 was used, to provide each of cosmeticcompositions. Here, for the preparation of each polymer,2-amino-2-methyl-1-propanol manufactured by FUJIFILM Wako Pure ChemicalCorporation was added in an amount of 90 mol % based on the amount ofthe carboxylic acid in Example 30, or 2-amino-2-methyl-1-propanolmanufactured by FUJIFILM Wako Pure Chemical Corporation was added in anamount of 33 mol % based on the amount of the carboxylic acid in Example31, in place of addition of 90 mol % of lactic acid based on the amountof the amine.

<Evaluation of Hygroscopic Resistance>

(a) Preparation of Hair Bundles for Evaluation

Caucasian hair bundles having a length of 27.5 cm, a hair bundle widthat root of hairs of 10 mm, and a total mass of 1.0 g were used for theevaluation. The hair bundles were previously washed with plain shampooand plain rinse, and the hair bundles with hairs in a wet state werewound around a glass rod having a diameter of 20 mm and a length of 60mm and fixed. The hair bundles were dried at 60° C. for one hour, andthe hair bundles were then allowed to cool at room temperature for 15minutes or more.

-   (Plain shampoo: EMAL 227, manufactured by Kao Corporation: 47.2% by    mass, AMINON C-11S, manufactured by Kao Corporation: 2.50% by mass,    sodium benzoate, manufactured by FUJIFILM Wako Pure Chemical    Corporation: 1.10% by mass, sodium chloride, manufactured by    FUJIFILM Wako Pure Chemical Corporation: 1.20% by mass,    ion-exchanged water: 86.6% by mass)-   (Plain rinse: QUARTAMIN E-80K, manufactured by Kao Corporation:    2.22% by mass, KALCOL, manufactured by Kao Corporation: 1.78% by    mass, Propylene glycol, manufactured by FUJIFILM Wako Pure Chemical    Corporation: 1.00% by mass, Phenoxyethanol, manufactured by FUJIFILM    Wako Pure Chemical Corporation: 0.30% by mass, ion-exchanged water:    94.7% by mass)

A hair cosmetic (concentration: 0.5% by mass) in a state fixed to theglass rod in an amount 0.7 g was evenly applied to hair. The hair wasagain dried at 60° C. for one hour, and then allowed to cool at roomtemperature for 15 minutes or longer, and e hair bundles were removed.from the glass rod, to provide hair bundles for evaluation.

(b) Apparatus and Method

The hair setting properties were evaluated with a shaking apparatusshown in FIGS. 1 and 2. This shaking apparatus is an apparatus forshaking hair bundles that are partly fixed by oscillating rotarymotions. With a distance from a center to an end of the rotating memberof 120 mm, and a rotation angle of 30°, the oscillating motions wererepeated 90 times per minute. A back plate of 5 mm in thickness and oneend of hair bundles were fixed to the rotating member at an interval of40 mm, and impacts were given to the hair bundles by hitting the hairbundles that were swung due to shaking against the back plate. By usingthis apparatus, the hair bundles were shaken at 25° C. and 90% RH for 30minutes. The length of the hair bundles after 30 minutes of shaking wasmeasured, and a curl setting ratio was calculated in accordance with thefollowing formula. The results are shown in Tables 2 to 9.

Curl Setting Ratio, %=(Length of Hair Bundles)/(Length of Untreated HairBundles=27.5 cm))×100

TABLE 2 Examples 1 2 3 4 5 A Polymer a1, g 3.6 0 0 0 0 Polymer a2, g 03.54 0 Polymer a3, g 0 0 3.54 0 0 Polymer a4, g 0 0 0 3.54 0 Polymer a5,g 0 0 0 0 3.54 Tg of Component (A), ° C. 96 83 81 71 84 Mw of Component(A) 190,000 100,000 340,000 320,000 370,000 Amount of amine of 5 5 5 5 5Component (A), % by mass Amount of carboxylic acid of 0 0 0 0 0Component (A), % by mass B Polymer b1, g 2.4 2.36 2.36 2.36 2.36 Polymerb2, g 0.86 0.84 0.84 0.84 0.84 Amount of amine of 12 12 12 12 12Component (B), % by mass Amount of carboxylic acid of 0 0 0 0 0Component (B), %.by mass C Polymer c1, g 0.14 0.26 0.26 0.26 0.26 A/BMass ratio 1.1 1.1 1.1 1.1 1.1 C/(A + B + C), % by mass 2 3.7 3.7 3.73.7 Curl setting ratio, % 36 32 31 32 30

TABLE 3 Ex. 6 7 8 9 10 11 A Polymer a1, g 1.12 2.25 2.89 3.19 4.49 5.06Tg of Component (A), ° C. 96 96 96 96 96 96 Mw of Component (A) 190,000190,000 190,000 190,000 190,000 190,000 Amount of amine of 5 5 5 5 5 5Component (A), % by mass Amount of carboxylic acid of 0 0 0 0 0 0Component (A), % by mass B Polymer b1, g 4.14 3.31 284 2.61 1.66 1.24Polymer b2, g 1.48 1.18 1.01 0.93 0.59 0.44 Amount of amine of 12 12 1212 12 12 Component (B), % by mass Amount of carboxylic acid of 0 0 0 0 00 Component (B), % by mass C Polymer c1, g 0.26 0.26 0.26 0.26 0.26 0.26A/B Mass ratio 0.2 0.5 0.75 0.9 2 3 C/(A + B + C), % by mass 1.7 3.7 3.73.7 3.7 3.7 Curl setting ratio, % 29 31 33 34 30 34

TABLE 4 Ex. 1 12 13 14 15 16 A Polymer a1, g 3.6 3.67 3.66 3.35 3.132.57 Tg of Component (A), ° C. 96 96 96 96 96 96 Mw of Component (A)190,000 190,000 190,000 190,000 190,000 190,000 Amount of amine of 5 5 55 5 5 Component (A), % by mass Amount of carboxylic acid of 0 0 0 0 0 0Component (A), % by mass B Polymer b1, g 2.4 2.45 2.44 2.23 2.08 1.71Polymer b2, g 0.86 0.87 0.87 0.8 0.74 0.61 Amount of amine of 12 12 1212 12 12 Component (B), % by mass Amount of carboxylic acid of 0 0 0 0 00 Component (B), % by mass C Polymer c1, g 0.14 0.01 0.04 0.63 1.05 2.1A/B Mass ratio 1.1 1.1 1.1 1.1 1.1 1.1 C/(A + B + C), % by mass 2 0.10.5 9 15 30 Curl setting ratio, % 36 36 37 36 32 34

TABLE 5 Examples 1 17 18 19 20 A Polymer a1, g 3.6 0 0 0 0 Polymer a2, g0 3.54 0 Polymer a3, g 0 0 3.54 0 0 Polymer a4, g 0 0 0 3.54 0 Polymera5, g 0 0 0 0 3.54 Tg of Component (A), ° C. 96 50 40 96 121 Mw ofComponent (A) 190,000 400,000 340,000 40,000 200,000 Amount of amine of5 5 5 5 30 Component (A), % by mass Amount of carboxylic acid of 0 0 0 00 Component (A), % by mass B Polymer b1, g 2.4 2.36 2.36 2.36 2.36Polymer b2, g 0.86 0.84 0.84 0.84 0.84 Amount of amine of 12 12 12 12 12Component (B), % by mass Amount of carboxylic acid of 0 0 0 0 0Component (B), %.by mass C Polymer c1, g 0.14 0.26 0.26 0.26 0.26 A/BMass ratio 1.1 1.1 1.1 1.1 1.1 C/(A + B + C), % by mass 2 3.7 3.7 3.73.7 Curl setting ratio, % 36 32 30 33 31

TABLE 6 Ex. 21 22 23 24 25 26 27 A Polymer a1, g 3.54 3.54 3.54 0 3.543.54 3.54 Polymer a12, g 0 0 0 3.54 0 0 0 Tg of Component (A), ° C. 9696 96 108 96 96 96 Mw of Component (A) 190,000 190,000 190,000 114,000190,000 190,000 190,000 Amount of amine of 5 5 5 5 5 5 5 Component (A),% by mass Amount of carboxylic acid of 0 0 0 0 0 0 0 Component (A). % bymass B Polymer b1, g 0 0 0 0 236 2.36 2.36 Polymer b2, g 0 0 0 0 0.840.84 0.84 Polymer b3, g 3.2 0 0 0 0 0 0 Polymer b4, g 0 3.2 0 0 0 0 0Polymer b5,g 0 0 3.2 0 0 0 0 Polymer b9, g 0 0 0 3.2 0 0 0 Tg ofComponent (B), ° C. 124 87 96 126 61 61 61 Amount of amine of 7 50 30 2512 12 12 Component (B), % by mass Amount of carboxylic acid of 0 0 0 0 00 0 Component (B), % by mass C Polymer c1, g 0.26 0.26 0.26 0 0 0 0Polymer c3, g 0 0 0 0.26 0 0 0 Polymer c4, g 0 0 0 0 0.26 0 0 Polymerc5, g 0 0 0 0 0 0.26 0 Polymer c6, g 0 0 0 0 0 0 0.26 A/B Mass ratio 11.1 1.1 1.1 1.1 1.1 1.1 C/(A + B + C), % by mass 3.7 3.7 3.7 3.7 3.7 3.73.7 Curl setting ratio, % 32 39 47 36 33 35 33

TABLE 7 Ex. 28 29 A Polymer a10, g 3.54 0 Polymer a13, g 0 3.54 Tg ofComponent (A), ° C. 82 67 Mw of Component (A) 250,000 40,000 Amount ofamine of 0 0 Component (A), % by mass Amount of carboxylic acid of 0 0Component (A), % by mass B Polymer b1, g 2.36 0 Polymer b2, g 0.84 0Polymer b7, g 0 3.2 Amount of amine of 12 7 Component (B), % by massAmount of carboxylic acid of 0 0 Component (B), % by mass C Polymer c1,g 0.26 0 Polymer c5, g 0 0.26 A/B Mass ratio 1.1 1.1 C/(A + B + C), % bymass 3.7 3.7 Curl setting raw, % 33 32

TABLE 8 Ex. 30 31 A Polymer a11, g 3.54 0 Polymer a14, g 0 3.54 Tg ofComponent (A), ° C. 134 98-108 Mw of Component (A) 100,000 120,000Amount of amine of 0 0 Component (A), % by mass Amount of carboxylicacid of 3 19 Component (A), % by mass B Polymer b6, g 3.2 0 Polymer b8,g 0 3.2 Amount of amine of 0 0 Component (B), % by mass Amount ofcarboxylic acid of 7.5 10 Component (B), % by mass C Polymer c2, g 0.260 Polymer c7, g 0 0.26 A/B Mass ratio 1.1 1.1 C/(A + B + C), % by mass3.7 3.7 Curl setting raw, % 35 30

TABLE 9 Comp. Ex. 1 2 3 A Polymer a1, g 0 0 2.7 Polymer a15, g 0 2.89 0Tg of Component (A), ° C. — −54 96 Mw of Component (A) — 60,000 190,000Amount of amine of — 0 5 Component (A), % by mass Amount of carboxylicacid of — 0 0 Component (A), % by mass B Polymer b1, g 0 2.84 2.65Polymer b2, g 7 1.01 0.95 Polymer b7, g 0 3.2 Amount of amine of 2 12 11Component (B), % by mass Amount of carboxylic acid of 0 0 0 Component(B), % by mass C Polymer c1, g 0 0.26 0 Polymer c8, g 0 0 0.7 A/B Massratio 0 0.75 0.75 C/(A + B + C), % by mass 0 3.7 10 Curl setting raw, %16 12 9

As shown in Tables 2 to 8, it can be seen that all of the cosmeticcompositions of the present invention are excellent in hygroscopic cresistance. Were, Tables 2 to 6 show examples where cationic polymersare used for Components (A) and (B), and an anionic polymer is used forComponent (C), and Table 7 shows examples where a nonionic polymer isused for Component (A), a cationic polymer is used for Component (B),and an anionic polymer is used for Component (C), and Table 8 showsexamples where anionic polymers are used for Components (A) and (B), anda cationic polymer is used for Component (C). As shown in Table 9, itcan be seen that all the comparative products that do not meet therequirements of the present invention are disadvantageous in hygroscopicresistance, as compared to the cosmetic compositions of the presentinvention.

INDUSTRIAL APPLICABILITY

The cosmetic composition of the present invention can be suitably usedin cosmetics for hair.

1: A cosmetic composition comprising the following Components (A), (B),and (C): Component (A): a hydrophobic polymer which dissolves in ethanolat 25° C. in an amount of 1% by mass or more, and has a glass transitiontemperature Tg of 30° C. or higher, the polymer having the same electriccharge as the following Component (B), or not having an electric charge;Component (B): a hydrophilic ionic polymer which dissolves in ethanol at25° C. in an amount of 1% by mass or more; and Component (C): an ionicpolymer which dissolves in ethanol at 25° C. in an amount of 1% by massor more, the ionic polymer having a different kind of an electric chargeto that of the Component (B). 2: The cosmetic composition according toclaim 1, wherein: Component (B) comprises a cationic polymer; andComponent (C) comprises at least one selected from the group consistingof an anionic polymer and a polymer having an amphoteric group. 3: Thecosmetic composition according to claim 2, wherein Component (A)comprises a cationic polymer or a nonionic polymer. 4: The cosmeticcomposition according to claim 1, wherein: Component (B) comprises ananionic polymer; and Component (C) comprises at least one selected fromthe group consisting of a cationic polymer and a polymer having anamphoteric group. 5: The cosmetic composition according to claim 4,wherein Component (A) comprises at least one selected from the groupconsisting of an anionic polymer or a nonionic polymer. 6: The cosmeticcomposition according to claim 1, wherein a weight-average molecularweight of Component (A) is 5,000 to 500,000. 7: The cosmetic compositionaccording to claim 1, wherein at least one selected from the groupconsisting of Component (A), Component (B), and Component (C) comprisesat least one selected from the group consisting of an alkylamide groupand an aminoalkylamide group. 8: The cosmetic composition according toclaim 1, wherein at least one selected from the group consisting ofComponent (A), Component (B), and Component (C) comprises at least oneselected from the group consisting of a constituting unit according toformula 1, a constituting unit according to formula 2, and aconstituting unit according to formula 3:

wherein: R¹ is a hydrogen atom or a methyl group, and each of R² and R³is independently a hydrogen atom or a hydrocarbon group having 1 to 12carbon atoms which may have a substituent, provided that at least one ofR² and —R³ is a hydrocarbon group having 1 to 12 carbon atoms which mayhave a substituent, or alternatively, R¹ and R³ are bound to each otherto form a ring structure having 3 to 24 carbon atoms;

wherein: R⁴ is a hydrogen atom or a methyl group; X¹ is an oxygen atomor NH; when X¹ is an oxygen atom; —Y¹—X² is a group selected from analkyl group having 1 to 18 carbon atoms, an isobornyl group,—(CH₂)_(p)—N(R⁵)₂, —(CH₂)_(p)—OR⁵, —C(CH₃)₂—N(R⁵)₂, and —C(CH₃)₂—OR⁵,where p is 1 to 3, and R⁵ is a hydrogen atom or an alkyl group having 1to 4 carbon atoms; or Y¹ is a group containing 1 to 15 polyoxyalkylenegroups having 2 or 3 carbon atoms, and X² is a hydrogen atom, —CH₃, or—C₂H₅; and when X¹ is NH, Y¹ is an alkylene group having 1 to 3 carbonatoms, X² is —N(R⁵)₂, where R⁵ is a hydrogen atom or an alkyl grouphaving 1 to 4 carbon atoms; and

wherein R⁶ is a hydrogen atom or a methyl group, and X³ is an aromaticgroup having 6 to 12 carbon atoms. 9: The cosmetic composition accordingto claim 1, wherein a mass ratio of Component (A) to Component (B)(Component (A)/Component (B)) is 0.1 to 5.0. 10: The cosmeticcomposition according to claim 1, wherein a proportion of a content ofComponent (C) to a total content of Components (A), (B), and (C)(Component (C)/(Components (A)+(B)+(C))) is 0.05% to 50% by mass. 11:The cosmetic composition according to claim 1, wherein an amount ofamine or an amount of carboxylic acid in Component (A) is 1% to 50% bymass. 12: The cosmetic composition according to claim 1, wherein anamount of amine or an amount of carboxylic acid in Component (B) is 1%to 60% by mass. 13: The cosmetic composition according to claim 1,comprising ethanol. 14: The cosmetic composition according to claim 1,formulated as a hair cosmetic. 15: A method of hair styling, comprisingapplying a cosmetic composition as defined in claim 1 to hair.